Spot color
From ColorWiki
A Spot Color is a specially mixed ink that produces a color different from what can be produced using normal CMYK inks. In contrast to CMYK or process color, which creates colors by laying down layers of cyan, magenta, yellow, and black in varying amounts on the printed page, spot colors are pre-mixed and applied individually to the printed page. The general use of spot colors is to produce colors that are outside the gamut (for example more saturated) of process colors.
Pantone is the dominant spot color printing system in the United States.